I'm new to this.

I'm going to sell my CP5700 and jump to the EOS 300D, so I'm looking at some entry level lenses. Althought I'm pretty informed on camera usage and terms, I'm in the dark with lense descriptions. To make this switch succesfuly I need to get the same zoom range as the 5700 in one lens to keep the fiance happy. Here is what I'm looking at: